63011 Weather (Ballwin, MO)

Weather forecast for: Ballwin MO

Last Update: 6:16 pm CDT Sep 8, 2026

Tonight: Mostly clear, with a low around 75. South wind around 6 mph.

Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Sunny, with a high near 95. Heat index values as high as 101. South wind 5 to 9 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9pm. Low around 71. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 80%.

Thursday: Showers and thunderstorms, mainly before 1pm. High near 82. Calm wind becoming northwest around 5 mph. Chance of precipitation is 80%.

Thursday Night: Partly cloudy, with a low around 65. Calm wind.

Friday: Mostly sunny, with a high near 86.

Friday Night: Mostly clear, with a low around 68.

Saturday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Saturday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.

Sunday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

Sunday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.

Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.

Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.

Tuesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.